Help with php4pl2 and CyberCash

Could someone please help me, with this installation of php4pl2 with CyberCash support? For some reason every time I try to install it with --with-cybercash=/usr/local/etc/mck-3.2.0.6-i386-pc-freebsdelf4.0 when it try to start apache it will error out with the following: Syntax error on line 69 of /usr/local/etc/apache/apache.conf: Cannot load /usr/local/libexec/apache/libphp4.so into server: /usr/local/libexec/apache/libphp4.so: Undefined symbol "base64_ dec_size" Now I can install it and start apache just fine without the --with-cybercash and it will work with any problems. How can I fix this? and why is it happening? I'm running on a FreeBSD 4.0 server and my web server is running the following: Apache/1.3.12 (Unix) mod_ssl/2.6.4 OpenSSL/0.9.5a PHP/3.0.16 PHP/4.0.1pl2 Thank you all in advanced